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A novel circulating abrasive flow strategy using circular halbach array for magneto-rheological finishing of Ti-6Al-4V

Trinh Nguyen Duy, Tien Dung Hoang, Thoa Pham Thi Thieu, Que Nguyen Van, Quang Kieu Van, Mai Nguyen Trong, Quan Nguyen Ngoc, Nhat Ngo Minh

Journal of Machine Engineering

2024

Vol. 24, No. 1

118--134

In the pursuit of advancing the surface machining efficiency of Ti-6Al-4V material through magnetic polishing, this study introduces a new approach methodology. A novel approach integrates Magneto-Rheological Finishing (MRF) into a circulating system, employing a circular Halbach array to ensure a continuous and uniform flow of magnetic abrasives. Employing simulation and theoretical analysis, MRF polishing processes with the fluid dynamics of abrasive (SiO2) and magnetic particles (Fe3O4) during the finishing process of Ti-6Al-4V material using a circulating conveyor designed for the regeneration of abrasive particles. To investigate the impact of magnetic fluid distributions influenced by magnetic fields on the machining process, we meticulously conduct experimental analyses. The findings underscore that diminishing the working distance results in an expanded distribution range of magnetic abrasive fluid on the conveyor belt. Consequently, this induces a noteworthy variation in impact positions on the workpiece surface, leading to an increased exposed area. A pivotal outcome of this study is the observed augmentation in machining quality and efficiency. Remarkably, the surface roughness of the Ti-6Al-4V workpiece undergoes a substantial improvement, diminishing from an initial Ra = 431.1 nm to an impressive Ra = 39.6 nm within a 30-minute timeframe.

Contemporary applications of magnetoreological fluids for finishing process

Sutowska M., Sutowski P.

Journal of Mechanical and Energy Engineering

2017

Vol. 1, No 2

141--152

The article presents the current state of knowledge on the use of magnetorheological fluids for finishing processes. The paper descsribes the type of the materials and surfaces to be machined and the composition of the magnetorheological fluids used in this area. The most interesting applications were described in more detail, paying particular attention to the schematic diagram of the test stands, obtained results of experimental tests and the results of roughness measurements of the surfaces exposed to magnetically controlled fluids. The article also describes the directions of the newest experimental and simulation research on the application of magnetorheological fluids in the field.